| Because of the intrinsic character and bad imaging system environment of equipment themselves ,most of images have kinds of defects such as worse contrast of between object and background , the edge is commonly,noise is big,and so on.So I focus on contrast enhancement question of normal and infrared images. The major research is included : first a nonlinear filtering of homomorphic system is designed and used to deal with two kinds of actual normal images processing;next, a near infrared image model designed and simulated is present. It offers the good reference foundation for infrared image process later;at last, a new method will be devised to combined with pretreatment of homomorphic technology and infrared image. Its creativity is consistently affirmed by specialists of Acta Photonica Sinica.They also appraise that this new way will have important academic reference and pratical applying value of infrared image process for future.From experiments and theory analysis ,we know that homomorphic technology can be an effective pretreatment algorithm for normal and infrared images;furthermore,it establishes a good foundation on more object detecting and segmentation ;at the same time ,algorithm itself is simple to come true for real time,at last it accords with trend of modern digital image processing. |